A chronology of the world's highest peak
by Borgna Brunner
The 13th Dalai Lama opens Tibet to foreigners. British reconnaissance party leaves Darjeeling to explore a route to Mt. Everest from the Tibetan side.
First attempt to climb Mt. Everest made by a British team which included George Mallory.
The first recorded deaths on Everest occur when seven Sherpa porters, part of a British expedition, die in an avalanche.
George Mallory, 38, and Andrew Irvine, 22, disappear on their way to the summit. They were last spotted by a member of the expedition, who reported they "were going strong for the top." Whether they reached the summit remains a mystery.
Swiss climber Raymond Lambert and renowned Sherpa climber Tenzing Norgay almost make it to the South Summit before turning back.
First summit of Everest accomplished by Edmund Hillary, New Zealand, for the British Commonwealth, and Tenzing Norgay, a Sherpa from India. Neither will ever acknowledge which of them was technically the first.
The height of Mt. Everest is adjusted by 26 feet to 29,028 feet (8,848 m) from the original measurements of the 1852 Great Trigonometrical Survey of India.
The first American, James Whittaker, summits Everest.
Junko Tabei (Japan) becomes the first woman to summit.
Reinhold Messner makes the first solo ascent of Everest (also without supplemental oxygen).
15 climbers died on Everest — the most casualties in a single year.
George Mallory's body is found by a search expedition at 27,000 feet. Searchers had hoped to find a camera that might contain photos of Mallory and Irvine on the summit or some other proof that they were the first to summit Everest, but no evidence is found. On May 5 a team of nine made satellite observations at the summit of Everest.
On Nov. 11, the revised official elevation of Everest is announced by the National Geographic Society to be 29,035 feet (8,850 meters).
142 climbers make it to the summit—the most ever in a single year.
American Erik Weihenmayer becomes the first blind person to reach Everest's top.
At 70, Japanese climber Yuichiro Miura becomes the oldest person ever to reach Everest's summit, and a 15-year-old Sherpa girl, Ming Kipa, becomes the youngest.
Appa Sherpa climbs Everest for the 16th time, breaking his own record for being the person who has climbed Everest the most. He first summited in 1989.
Takao Arayama displaces Yuichiro Miura's record and becomes the oldest Everest climber at 70 years, 7 months, and 13 days. Miura was 70 years, 7 months, and 10 days.
The first cellphone call is made from the top of Everest by Rod Baber, a British climber. "It's cold, it's fantastic, and the Himalayas are everywhere," he said in the call.
Katsusuke Yanagisawa, 71, becomes the oldest person to scale Everest, beating the previous record set by Takao Arayama, 70, in 2006. He is the third Japanese in recent years to set a record as the oldest Everest climber.
Clare O'Leary becomes the first Irishwoman to summit Everest and Pat Falvey becomes the first Irishman to summit from both the Nepalese and Tibetan sides.
On May 8, the Olympic torch was carried by climbers to the âroof of the world,â reaching the 29,035 foot summit of Mount Everest at 0920 local time. During the ascent, Tibetan women were the first and last to carry the torch.
On May 22, Apa, a veteran Sherpa guide, climbed to the top of Mount Everest for the 18th time at age 47, beating his own record for the most summits of the world's tallest mountain.
Nepali national Min Bahadur Sherchan, 76, became the oldest person to summit Everest on May 25.
The May 2009 climbing season witnessed the 19th successful trip for Apa Sherpa as a member of the Eco Everest Expedition, while Dave Hahn of Taos, New Mexico reached a milestone when he summited for the 11th time, the most for a non-Sherpa.
Apa Sherpa broke his own world record and reached the summit of Mt. Everest for the 20th time on 22 May 2010.
On May 22, Jordan Romero, a 13-year-old from California, became the youngest person to summit Everest.
The mountain claimed its first climber on May 9; Shailendra Kumar Upadhyay, 81, an ex-foreign minister from Nepal died during his attempt to become the oldest summiter of the great mountain.
Apa Sherpa again broke his own world record and reached the summit of Mt. Everest for the 21st time on 11 May 2011.
On May 21, John Delaney, 41, from Kilcock, Co Kildare, became the first Irishman to die on Mt. Everest—just 50m from the summit, and only days after his wife gave birth to their third child.
Japan's Tamae Watanabe, 73, became the oldest woman to reach the summit of Mt. Everest on May 19, 2012. She successfully climbed Everest in 2002 at age 63.
The estimated 600 summits in the spring of 2013 brought the total estimated summits to 6,800.
Phurba Tashi joined Apa Sherpa in the record books with 21 summits.
On May 23, Japanese Miura Yiuchiro became the oldest person to summit at age 80.
Sixteen Sherpa guides die in an avalanche in April. They were fixing ropes for climbers at an elevation of 19,000 feet when the avalanche hit. It is the single most deadly accident on Everest. After the incident, dozens of Sherpa guides walked off the job in protest over the Nepalese government's response to the tragedy. The government pledged a relief sum of around $400 to the families of the guides who died in the avalanche. The Sherpa guides were angered by the relief sum, calling it an insult.
On April 25, 2015, at least 22 people die and dozens are injured in an avalanche triggered by a magnitude-7.8 earthquake in central Nepal. It is the deadliest avalanche ever recorded on Mount Everest and devastates the country—killing 8,500 nationwide. For the first time in 41 years, there are no summits.
The climbers are back on the mountain, including two Iraq war veterans who lost right legs to roadside bombs, hoping to become the first combat amputees to reach the top of Mount Everest.
According to Everest statistics compiler Alan Arnette, it currently costs an average $45,000 to climb Everest, but depending on customization and route choices, the price tag can be as high as $85,000.
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